package com.dtz.dbcp;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.apache.commons.dbcp2.BasicDataSource;
import org.junit.Test;
public class DBCPDemo1 {
@Test
public void testDBCPDemo1() {
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs = null;
try {
@SuppressWarnings("resource")
BasicDataSource dataSource = new BasicDataSource();
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
dataSource.setUrl("jdbc:mysql://127.0.0.1:3306/stu");
dataSource.setUsername("root");
dataSource.setPassword("033516");
conn = dataSource.getConnection();
String sql = "select * from stu";
ps = conn.prepareStatement(sql);
rs = ps.executeQuery();
while (rs.next()) {
System.out.println(rs.getString("sname"));
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
rs.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
ps.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
conn.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}

dbcp中报空指针异常如何解决?
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2条回答 默认 最新
- weixin_43306301 2019-07-31 16:45关注
这里主要是mysql的驱动包版本过低(5.0)或dbcp的版本过高(2.7),dbcp2.0以上需要mysql的驱动包为5.1.3以上
本回答被题主选为最佳回答 , 对您是否有帮助呢?解决 1无用